IEC 60071-2 PDF

IEC constitutes application guidelines and deals with the selection of insulation levels of equipment or installations for three-phase electrical systems. It gives guidance for the determination of the rated withstand voltages for ranges I and II of IEC and to justify the association of these rated values with the standardized highest voltages for equipment. It covers three-phase systems with nominal voltages above 1 kV. It has the status of a horizontal standard in accordance with IEC Guide This edition includes the following significant technical changes with respect to the previous edition: a the annex on clearance in air to assure a specified impulse withstand voltage installation is deleted because the annex in IEC is overlapped; b 4.

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AWS D1. Means, Inc. Look Inside. IEC 4th Edition, March Complete Document. Insulation co-ordination — Part 2: Application guidelines. Detail Summary View all details. Price USD. Single User. In Stock. Need it fast? Ask for rush delivery. Most backordered items can be rushed in from the publisher in as little as 24 hours.

Some rush fees may apply. Add to Cart. View Full Details and Buy. Complementary Documents and Links:. This part of IEC constitutes application guidelines and deals with the selection of insulation levels of equipment or installations for three-phase electrical systems.

Its aim is to give guidance for the determination of the rated withstand voltages for ranges I and II of IEC and to justify the association of these rated values with the standardized highest voltages for equipment. This association is for insulation co-ordination purposes only.

The requirements for human safety are not covered by this document. This document covers three-phase systems with nominal voltages above 1 kV. The values derived or proposed herein are generally applicable only to such systems.

However, the concepts presented are also valid for two-phase or single-phase systems. This document covers phase-to-earth, phase-to-phase and longitudinal insulation. This document is not intended to deal with routine tests. These are to be specified by the relevant product committees. The content of this document strictly follows the flow chart of the insulation co-ordination process presented in Figure 1 of IEC Clauses 4 to 7 correspond to the squares in this flow chart and give detailed information on the concepts governing the insulation coordination process which leads to the establishment of the required withstand levels.

This document emphasizes the necessity of considering, at the very beginning, all origins, all classes and all types of voltage stresses in service irrespective of the range of highest voltage for equipment. Only at the end of the process, when the selection of the standard withstand voltages takes place, does the principle of covering a particular service voltage stress by a standard withstand voltage apply. Also, at this final step, this document refers to the correlation made in IEC between the standard insulation levels and the highest voltage for equipment.

The annexes contain examples and detailed information which explain or support the concepts described in the main text, and the basic analytical techniques used.

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Do you need a multi-user copy? IEC constitutes application guidelines and deals with the selection of insulation levels of equipment or installations for three-phase electrical systems. It gives guidance for the determination of the rated withstand voltages for ranges I and II of IEC and to justify the association of these rated values with the standardized highest voltages for equipment. It covers three-phase systems with nominal voltages above 1 kV.

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